runkit_function_redefine
(PECL runkit >= 0.7.0)
runkit_function_redefine — Replace a function definition with a new implementation
说明
runkit_function_redefine ( string$funcname
, string $arglist
, string $code
[, bool $return_by_reference = NULL
[, string $doc_comment = NULL
]] ) : bool
runkit_function_redefine
( string $funcname
, Closure $closure
[, string $doc_comment = NULL
] ) : bool
Note: 默认情况下，仅在用户空间可删除，重命名，或者修改函数。为了覆盖内部函数，必须启用 php.ini 中的 runkit.internal_override 设置。
参数
funcname
Name of function to redefine
arglist
New list of arguments to be accepted by function
code
New code implementation
closure
A closure that defines the function.
return_by_reference
Whether the function should return by reference.
doc_comment
The doc comment of the function.
返回值
成功时返回 TRUE， 或者在失败时返回 FALSE。
更新日志
closure has been added.
return_by_reference and
doc_comment have been added.
范例
Example #1 A runkit_function_redefine() example
<?php
function testme() {
echo "Original Testme Implementation\n";
}
testme();
runkit_function_redefine('testme','','echo "New Testme Implementation\n";');
testme();
?>
以上例程会输出：
Original Testme Implementation New Testme Implementation
参见
runkit_function_add() - Add a new function, similar to create_function runkit_function_copy() - Copy a function to a new function name runkit_function_rename() - Change a function's name runkit_function_remove() - Remove a function definition runkit_method_redefine() - Dynamically changes the code of the given method
User Contributed Notes 2 notes
up down 16 lucato at gmail dot com ¶7 years ago
Note to users: language constructs (eval, die, exit, isset, unset, echo etc.) which might be confused with functions, cannot be renamed or redefined even with runkit.internal_override.
up
down
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corentin dot delorme at linagora dot com ¶11 years ago
Here is another example with a parameter:
<?php
function hello_world($word) {
echo "Original Hello World: $word\n</br>";
}
$helloWorld = 'echo "Redefined Hello World: $word\n</br>";';
hello_world('test1');
runkit_function_redefine('hello_world', '$word', $helloWorld);
hello_world('test2');
?>
add a note
官方地址：https://www.php.net/manual/en/function.runkit-function-redefine.php